Trolley.



- EQT NTBD AUGA, 190a. L. W. CAMPBELL; H

TROLLEY..

' APPLICATION IILED'JAB.4,19M.

i l i l Specification of Letters Patent.

" Application filed January 4, 1907. Serial No. 350,834.

UKIT D s ig, Parana OFFICE.

Patented. Aug. 4, 1908.

To or! rion; it may concern: i

Be it iinnfi'h that l, Lnox W. CAMPBELL, of Kiwi-socket, in the county of Providence and State uf 'lihode lsland, have invented certain new and useful Improvements in Trolleys, of which the following is a specification- Th s invention has relation to trolleys.

ltE'B ops-rated under present conditions, a troiiey such as employed on the various street car in which the car motors receive their current from an overhead conductor, ..ss :1 short life. In cases where the trolley has at siiding contact upon its bearing, the rapidity with which the trolley rotates \causes it to wear outwith rapidity, and

where it been proposed to mount the trolley upon ball-bearings so as to obviate the frictional or sliding contact referred to, thepsssage cf the current through the'concs and bails, causes arcs to be formed with the consequent destruction of the bearing.

Consequently, the primary object of the present invention is to provide a trolley which may he used continuously for a relatively length of time without becoming unduiy warmed or incllicient.

To this end. I propose to mount the trolley upon an anti i'riction hearing such as a ballbt-aring. so ss to obviate a sliding contact of the indie upon itsshait or arbor; and to,

reveni the formation of arcs within the.

caringi propose to f rm the cones or races of electricaily non-conducting material, so that the current cann t lind its way therethrough- In order that the current may be conducted from the trolley to its arbor and thence tizrorzh the harp to the inotor, sonic portions of the trolley are caused to ma -ic contact the shaft or arbor, of other appliant-e re ci- {or conducting the current from the troiiey the arbor.

Rea w the acc nnpanying' drawings imilar embodiment of the in- 1 represents the trolley in Fig. 2 represents a section me on the line 2-2 of Fig. 1. as a section on the line 3-3 of through 1 Fig. 2. 1 4 represents the cones or external 116:5, and .l' .3 rqiresczits the will make proper contact with the aerial conductor. In the: hub o is a large cavity a, one end wall of which is formed by the end a of the hub. Into this cavity are forced two races or cones b b. The shaft or arbor I: is provided with a double cone or inner race 2: which is peripherally grooved as at 0, so as to receive between it and the cones b b, the balls or spheres d. lnto the open end of the cavity and the hub is screwed a. threaded disk or wall a which is apcrtured to receive a screw (1, by which the cones b are rigidly secured in proper relation to each other and to the inner race or double cone 0'.

As previously indicated, I propose that the current shall not traverse the antifriction bearing, and to this end I preferably form one or both of the cones b b and c of some nonconducting material such as tibroid or other hard compound or material which will stand the wear and at the same time serve as a nonconductor of electricity.

In order that the current may sass from the trolley to the-arbor, preferab y employ metallic washers a c which make contact with the end walls a at, and with the arbor 0. These washers are held against axial movement by any suitable fastening devices. As a detail of construction, I propose to form cavities in the end walls a u and to fill the fame with graphite as indicated atf, so as To lubricate the contacting surfaces of the washer and the trolley to prevent wear thereof. For the purpose of providingconvcnient means for securing the end walla in place, it is formed with apertures g g to receive a spanner or other tool.

Ha ing thus explained the nature of the invention and described a way of construcb. ing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the modes of its use, I declare that what- I claim is:-

l. The combination with a shaft or arbor, of a trolle \',an antifriction bearing interposed between the trolley and the arbor comprising complemental races and rotatable.elements thercbetween, one or more of said races hcinformed of insulating material.

2. lhe combination with a shaft or arbor, of a trolley having a cavity in its liub, and end walls for said cavity of which one is removable, an aniifriction bearing located 111 5 homing against. the end walls of the cavity Intestim ny whereof I have affixed my signature, 1n presence of two wztnesses.

LEON W. CAMPBELL.

lVit-nesses: M. B. MAY, A. L. FOLSQM.

to conduct the current from the trolley to the arbor.

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